Carburetor



19490 F. D. WARBURTON 294629695 CARBURETQR Filed. June 10, 1944 2 Sheeus-Sheet 2 INVENTOR fiazrz k E" Eli-b up fun AT ORNEY Patented Feb. 22, 1949 UNITED STATES 'FAT'ENT OFF! CE 2,462,695 GARBURETOR Frank D. Warburton, Soutligate, Calif. Application June 10, 1944, Serial Nor-539,633

1 7 Claims. This invention has to do with carburetors.

itis'among the principal objects of my invenftlon'toprovide a carburetor of extremely simple an eflicient construction; which eliminates the necessity of the bothersome adjustments found essary in onventional carburetors; which re- "es no float; which provides maximum velocity the mixing chamber; and which eifect highly efficient fuel, atomization.

Theinvent'ion'has still further features oi novcity/and advantage which will become obvious from the following description wh rein, for purpos es'offexplaining my invention, I describe in betas one presently preferred embodiment there- ,of. I wish itunderstood at the outset, however, Lth'atthe invention, in its broader aspects as definedfby the accompanying claims, is not in-- tended to 'be limited to the details of structure and associationof parts now to be specifically s't forth, sinc e it is capable of being carried ut other physical forms which the ensuing nation will suggest to those working in this a1, V. p

"Inthe following description I shall refer to the "accompanying drawings, in which:

V1 'is'a medial vertical section;

,Flg. 2'is' a top plan view; fFig. 3 is a cross section on line of 1; il

Fig. "4 is a fragmentary side elevation.

-In the'dra'wings I show my carburetor as cor-.1- pflsing abo dy 5 adapted to be secured on the intake manifold 6 of an internal combustion enginebybolts I.

The body isprovided with a longitudinal passageway l defining a Venturi throat H, and a mixingchainber I2, the intake end of the sageway'being controlled by a butterfly valve l whichfis mounted in a transverse slot E2; in an operating shaft II journalled at its ends in the sidewall of the body, the butterfly being secured 1n the slot by set screws I8.

A'sleeve valve 29 is rotatably mounted. axially of-the body, its top end being provided with a ring 2|. The sleeve has a plurality of main outlet-portsn which are adapted to be moved intoand-out-of register with a well 2 3 from which ainai'n fuelpassageway 23 in the body leads to communicate with 'ta main fuel discharge passsgewaz's uisposed longitudinally in the body,

the outlet end of the latter "passageway having a jet member 26 threaded therein. Thus "the charge of fuel admitted to well 24 and from there to passageway 25 depends upon the number-"of sleeve ports 22 which may be in register with the well at any given time. I show one of the ports 22 in register with the well, but a further counterclockwise rotation of the sleeve will move one ormore additional ports 22 intoregi'ster with the well and thus increase the supply of fuel charge.

Sleeve 20 also has an outlet port '30 adapted to be moved into and out'of registerwith an'outlet passageway 3i in the body to supply fuel, for motor idling, through a longitudinal passageway 32 which has a jet 34 screwed'into its discharge end. The idling fuel flow through passageway 32 may be adjusted by the needle valve 35 which is threaded into a hole 35a in the body, the hole intersecting passageway 32.

The approximately angular disposition o? the jets 36, 3G in the Venturi throat causes 'the fuel discharged therefrom to be more effectively broken up. In practice I find that the fuel becomes initially deposited in highlyatomized condition around the side wall of the mixing cham her and on the butterfly valve it so that its admixture with the incoming air stream is greatly facilitated.

A cap M) has its inwardly disposed flanged portion 4| threaded on to the body'and its top wall 42 bears against the sleeve 26 sufficiently to maintain a relatively tight seal. The purpose of the cap 45 is to provide an annular fuel chamber45 into which fuel is delivered through line 45 from the fuel source.

A neoprene seal ring 58 seats around'the sleeve 20 and againstthe inner surface of the top wall 42 of the cap and a compression spring '5] bears at one end against the ring and at its other end against the lower flanged portion of the sleeve, so that not only is the sleeve ring constantly urged into sealing relationship with the end wall 42, but also the flanged portion of the sleeve is urged against the tapered body surface against which it rotates, to prevent leakage. A seal ring 52 is provided between the lower end of cap All and the body.

On an outer end of the shaft l! I secure an operatingarm 54"fo'r the butterfly valve which may be connected by linkage 55 with the accelerator throttle conveniently provided in the drivers compartment of a vehicle. The arm is provided with a cam portion 56 which engages a radial follower pin 51 carried by the ring 21, so that the sleeve valve 20 may be operated in unison with the butterfly valve l5. To rotate the sleeve 20 in the opposite direction as the arm 54 is swung back, I utilize a coil spring 58 which is secured at one end to the ring 2| as by a screw 58a and secured to the cap wall 42 by a screw 58b.

While any desired number of ports 22 may be provided I prefer to utilize and show three such ports. The ports 22, 23 and 30, 3| are so relatively disposed that the idling port 3| is closed when one or more of the ports are in register with well 24, and vice versa.

From the foregoing it will be observed that when the butterfly valve l5 and sleeve 20 are simultaneously operated for operation of the motor, the air entering the inlet end of the passageway I0 past the butterfly draws fuel from the jet 26, the fuel also being under pressure in chamber 45 by virtue of action of the conventional fuel pump in the fuel line, not shown. The velocity of the explosive charge is thus maintained at its maximum since there is no intervening gate or butterfly valve between the mixing chamber and the intake manifold, as is the case in conventional carburetors.

I claim:

1. A carburetor comprising a body presenting an air passageway therethrough, a control valve operably associated with the passageway, actuatingmeans associated with the control valve, walls providing a fuel supply chamber annularly of the body, a fuel port in the body communicating at its inlet end with the chamber and at its discharge end with the passageway, and a sleeve valve rotatably mounted on the body within the chamber for cooperation with the inlet end of the fuel port, said sleeve valve being operable in response to said actuating means to establish variable communication between the fuel supply chamber and said fuel port.

2. A carburetor comprising a body having a longitudinal passageway therethrough providing a Venturi throat, a control valve in the inlet end of the passageway, wall means providing a fuel chamber annularly of the body, the body having a fuel port, said port communicating at its inlet end with the fuel supply chamber and communicating at its outlet end with the passageway adjacent the throat, a sleeve valve rotatably mounted on the body within the chamber in position to open and close the inlet end of said port, means for actuating the control valve, and means for rotating the sleeve valve.

3. A carburetor comprising a body of rounded cross section having a longitudinal passageway therethrough, said body being adapted to be mounted on the intake manifold of an internal combustion engine with said passageway in communication therewith, said passageway being of relatively increased diameter at and adjacent its inlet end which increased diameter portion intersects the adjacent portion in a beveled shoulder providing a Venturi throat, a butterfly valve swingably mounted in the intake end of the passageway in position spaced towards the inlet end from said throat, a sleeve-like cap secured on the body and providing therewith an annular fuel chamber, the body having a fuel port, said port communicating at its inlet end with the fuel 4 chamber and angularly communicating with the passageway through said beveled shoulder, and a sleeve valve mounted within the cap for rotation about the body in position to open and close the inlet of the port.

4. In a carburetor having a body presenting an air passageway therethrough and a valve controlling the inlet end of the passageway, means for controllably supplying fuel to said passageway, comprising walls providing an annular fuel chamber in the body, a fuel delivery port having a fuel-receiving well at its inlet end communicating with the chamber and having its discharge end communicating with the passageway, and a sleeve valve controlling passage of fuel from the chamber to said well, said sleeve valve being rotatably carried by the body.

5. A carburetor comprising a body presenting an air passageway therethrough, a butterfly valve swingably carried by the body in position to control the inlet end of the passageway, said body being adapted to be mounted on the intake manifold of an internal combusion engine with the discharge end of the passageway communicating therewith, means providing a Venturi throat in the passageway, wall means providing an annular fuel chamber in the body, the wall portion providing the bottom of said chamber being beveled, the body having a fuel supply port whose inlet end communicates with the fuel chamber through said beveled wall and whose outlet end communicates with the passageway, a sleeve valve rotatably carried by the body, saidsleeve valve having a flanged portion disposed against said beveled wall portion, said flanged portion presenting an opening adapted to be moved into and out of registry with said port by virtue of rotation of the sleeve valve relative to the body, and spring means urging said flanged portion axially into engagement with said tapered wall portion.

6. A carburetor comprising a body presenting an air passageway therethrough, a butterfly valve swingably carried by the body in position to control the inlet end of the passageway, said body being adapted to be mounted on the intake manifold of an internal combustion engine with its discharge end communicating therewith, means providing a Venturi throat in the passageway, wall means providing an annular fuel chamber in the body, the wall portion providing the bottom of said chamber being beveled, a main fuel supply port in the body, an idling fuel supply port in the body, said respective ports having their inlets communicating with the chamber through said beveled wall portion and having their outlets communicating with the air passageway, a sleeve valve rotatably carried by the body, said sleeve having an annular flange disposed against said beveled wall portion, a pair of openings through said flange in position to alternately register with said ports in response to rotation of the sleeve Valve relative to the body, and means urging said flange axially into engagement with said tapered wall.

'I. A carburetor comprising a body presenting an air passageway therethrough, a control valve operatively associated with the inlet end of the passageway, walls providing a fuel supply chamber annularly of the body, one of said walls providing a well opening into the chamber, said body having a fuel port communicating at its inlet end with the well and communicating at its outlet end with the passageway, and a sleeve rotatably mounted axially of the body in position normally covering said well, and presenting a plurality of circumferentially spaced ports whose inlet ends 5 communicate with the fuel supply chamber, the outlet ends of said ports being normally out of register with the well but being adapted to be moved into register therewith by virtue of rotation of the sleeve.

FRANK D. WARBURTON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,099,828 Tatom June 9, 1914 1,220,965 Duvall Mar. 27, 1917 Number Number 

